What is the primary function of a coal feeder in a power plant?

The primary function of a coal feeder in a power plant is to control the flow of coal entering the pulverizer. This is essential for maintaining a consistent and optimal fuel supply to the combustion process. The precise flow of coal is critical because it ensures that the pulverizer can grind the coal to the required fineness for efficient combustion.

By regulating the amount of coal fed into the pulverizer, the feeder helps maintain the desired air-fuel ratio, which is crucial for efficient burning and helps achieve the required output from the boiler. A well-functioning coal feeder contributes to the overall efficiency and stability of the power generation process, reducing wastage and emissions as a result.

In contrast, controlling the temperature of the furnace, regulating water flow in the system, and monitoring emissions from the stack, while important functions in overall plant operation and environmental compliance, do not pertain directly to the coal feeder's primary role. The coal feeder specifically impacts the initial stage of fuel preparation and delivery to the combustion process, making its function distinct from these other operations.